A power system for a vehicle comprising: a battery; a charging interface for receiving external power to charge the battery; a network connecting the battery and the charging interface, wherein at least a part of the network is a DC network; an active EMI filter between the battery and the charging interface in the DC network.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A power system comprising: a DC network with a first power conductor and a second power conductor; an EMI filter in the DC network, wherein the EMI filter comprises an active circuit, wherein the active circuit comprises: a sensing section for sensing a noise in the first and second power conductor, a gain section for generating a cancelling noise on the basis of the noise sensed in the sensing section, and an injection section for injecting the cancelling noise from the gain section into the first power conductor or the second power conductor, wherein the injection section comprises a first coupling capacitance configured to inject the cancelling noise in the first power conductor, wherein the first coupling capacitance comprises a plurality of parallel capacitors with different capacitive values.
The invention relates to power systems, specifically addressing electromagnetic interference (EMI) noise in direct current (DC) networks. EMI noise in DC power conductors can disrupt sensitive electronic devices and systems, degrading performance and reliability. Traditional passive EMI filters are often insufficient for high-frequency noise suppression, leading to the need for more effective solutions. The disclosed power system includes a DC network with two power conductors and an EMI filter incorporating an active circuit. The active circuit operates by first sensing noise present in the conductors using a sensing section. The sensed noise is then processed in a gain section, which generates a cancelling noise signal designed to counteract the original noise. This cancelling noise is injected back into the DC network via an injection section, which includes a first coupling capacitance. The coupling capacitance is composed of multiple parallel capacitors with varying capacitive values, allowing for precise tuning and optimization of the noise cancellation process. This configuration enhances the filter's ability to suppress a wide range of noise frequencies effectively. The active EMI filter provides dynamic noise suppression, improving the overall performance and reliability of DC power systems.
2. The power system according to claim 1 , wherein the injection section comprises a second coupling capacitance configured to inject the cancelling noise in the second power conductor, wherein the second coupling capacitance comprises a plurality of parallel capacitors with different capacitive values.
A power system is designed to reduce electromagnetic interference (EMI) in power distribution networks by injecting cancelling noise into power conductors. The system includes an injection section that couples cancelling noise to a second power conductor, such as a neutral or ground conductor. The injection section features a second coupling capacitance, which is implemented using multiple parallel capacitors with varying capacitive values. This configuration allows for precise tuning of the coupling capacitance to match the impedance of the power conductor, ensuring effective noise cancellation. The use of multiple capacitors with different values provides flexibility in adjusting the total capacitance to optimize performance across different operating conditions. The system may also include a first coupling capacitance for injecting cancelling noise into a first power conductor, such as a phase conductor, which may similarly use parallel capacitors with different values. The overall system aims to minimize EMI by dynamically adjusting the injected cancelling noise to counteract unwanted noise signals in the power distribution network.
3. The power system according to claim 2 , wherein the gain section comprises an output point for outputting the cancelling noise, wherein the first coupling capacitance is connected with a first terminal to the first power conductor and with a second terminal to the output point of the gain section, wherein the second coupling capacitance is connected with a first terminal to the second power conductor and with a second terminal to the output point of the gain section.
A power system is designed to reduce electromagnetic interference (EMI) in power conductors by actively generating and injecting cancelling noise. The system includes a gain section that produces an inverted version of the noise present in the power conductors, effectively cancelling it out. The gain section has an output point that delivers the cancelling noise. Two coupling capacitances are used to connect the gain section to the power conductors. The first coupling capacitance links the first power conductor to the output point of the gain section, while the second coupling capacitance connects the second power conductor to the same output point. This configuration ensures that the cancelling noise is injected into both power conductors simultaneously, improving EMI suppression. The system is particularly useful in environments where power lines are susceptible to noise interference, such as in high-frequency applications or sensitive electronic systems. The use of coupling capacitances allows for efficient noise cancellation without direct electrical contact, reducing the risk of additional interference or signal distortion. The design ensures that the cancelling noise is precisely aligned with the original noise, maximizing suppression effectiveness.
4. The power system according to claim 1 , wherein the sensing section comprises a current transformer with a core inductively coupling the first power conductor, the second power conductor and an auxiliary conductor of the active circuit, wherein the auxiliary conductor is connected to the gain section.
A power system includes a sensing section that monitors electrical parameters in an active circuit. The sensing section uses a current transformer with a core that inductively couples to a first power conductor, a second power conductor, and an auxiliary conductor of the active circuit. The auxiliary conductor is connected to a gain section, which amplifies the sensed signals for further processing. The current transformer detects current flow in the power conductors and the auxiliary conductor, providing a differential or common-mode measurement. This design allows for accurate monitoring of electrical parameters, such as current imbalance or fault conditions, in the active circuit. The system may be part of a larger power distribution or protection system, ensuring reliable operation by detecting and responding to abnormal conditions. The use of inductive coupling ensures isolation between the sensing section and the active circuit, improving safety and reducing interference. The auxiliary conductor provides a reference or additional measurement path, enhancing the system's ability to detect and analyze electrical faults or performance issues.
5. The power system according to claim 4 , wherein a material of the core has a constant permeability between 150 kHz and 30 MHz.
A power system includes a transformer with a core made of a material having a constant permeability between 150 kHz and 30 MHz. The core is designed to minimize energy losses and improve efficiency in high-frequency power conversion applications. The transformer operates at frequencies within this range, where the core material maintains stable magnetic properties, reducing core losses and improving performance. The system may be used in power electronics, such as inverters, converters, or resonant circuits, where high-frequency operation is critical. The core material's consistent permeability ensures reliable operation across the specified frequency range, enhancing the system's overall efficiency and stability. This design addresses challenges in high-frequency power systems, such as core saturation and energy dissipation, by selecting a material that maintains optimal magnetic characteristics over the entire operating range. The transformer may be part of a larger power conversion system, where its high-frequency capabilities enable compact and efficient power delivery.
6. The power system according to claim 4 , wherein the material of the core comprises MgZn.
A power system includes a core made of a magnesium-zinc (MgZn) alloy. The core is part of a magnetic component, such as a transformer or inductor, designed to improve efficiency and reduce losses in power conversion applications. The MgZn alloy provides enhanced magnetic properties, including high permeability and low coercivity, which help minimize energy dissipation during operation. The core may be structured as a laminated or solid component, depending on the specific application requirements. The use of MgZn material in the core allows for better heat dissipation and mechanical stability, particularly in high-frequency power systems where thermal management is critical. This design helps address challenges related to energy efficiency and thermal performance in power electronics, ensuring reliable operation under varying load conditions. The core's composition and structure are optimized to support high-power-density applications while maintaining low core losses, making it suitable for use in renewable energy systems, electric vehicle chargers, and industrial power supplies. The MgZn alloy's properties contribute to improved system reliability and longevity, reducing maintenance costs and downtime.
7. The power system according to claim 4 , wherein the sensing section comprises a burden resistor parallel to the current transformer to transform the measured noise current into a noise voltage.
A power system includes a sensing section that detects noise currents in an electrical circuit. The sensing section comprises a current transformer that measures the noise current and a burden resistor connected in parallel to the current transformer. The burden resistor converts the measured noise current into a noise voltage, enabling further processing or analysis of the noise signal. This configuration allows for accurate detection and monitoring of electrical noise, which can interfere with system performance or signal integrity. The power system may also include additional components, such as a signal processing unit, to analyze the noise voltage and mitigate its effects. The use of a burden resistor in parallel with the current transformer provides a simple and effective way to convert the noise current into a measurable voltage, facilitating noise characterization and reduction in power systems.
8. The power system according to claim 4 , wherein the auxiliary conductor comprises less than 3 windings around the core, preferably less than 2 windings.
The invention relates to power systems, specifically to the design of auxiliary conductors in transformers or similar electromagnetic devices. The problem addressed is optimizing the performance of auxiliary conductors, which are secondary windings used for monitoring or control purposes, such as voltage regulation or fault detection. Traditional designs often use multiple windings, which can increase size, cost, and losses. The invention reduces the number of windings in the auxiliary conductor to less than three, preferably less than two, around the core of the transformer. This reduction minimizes material usage, physical space, and energy losses while maintaining sufficient signal quality for monitoring or control functions. The auxiliary conductor is part of a larger power system that includes a primary conductor and a core, where the auxiliary conductor is magnetically coupled to the primary conductor via the core. The system may also include a controller or sensor connected to the auxiliary conductor to process signals for voltage regulation, fault detection, or other applications. The invention improves efficiency and reduces complexity in power system designs by simplifying the auxiliary conductor structure.
9. The power system according to claim 8 , wherein the first power conductor is a first busbar, wherein the second power conductor is a second busbar, wherein the core is a ring core enclosing the first busbar and the second busbar.
This invention relates to a power system designed to measure electrical parameters such as current in a compact and efficient manner. The system addresses the challenge of accurately monitoring electrical currents in high-power applications where traditional measurement methods may be bulky or inefficient. The core component is a ring core that encloses two busbars, which serve as the primary and secondary power conductors. The ring core is part of a sensor assembly that detects magnetic fields generated by currents flowing through the busbars. The sensor assembly includes a magnetic core and a secondary winding, which converts the detected magnetic field into an electrical signal proportional to the current in the busbars. The system ensures precise current measurement by minimizing interference and improving signal accuracy. The ring core's design allows for a compact and integrated solution, reducing the need for additional space or complex wiring. This configuration is particularly useful in power distribution systems where reliable and accurate current monitoring is essential for safety and efficiency. The invention provides a robust and scalable approach to current sensing in high-power environments.
10. The power system according to claim 4 , wherein the first power conductor is a first busbar, wherein the second power conductor is a second busbar, wherein the core is a ring core enclosing the first busbar and the second busbar.
Technical Summary: This invention relates to a power system designed to measure electrical parameters, such as current, in a compact and efficient manner. The system addresses the challenge of accurately monitoring electrical currents in high-power applications where traditional measurement methods may be bulky or inefficient. The power system includes a first power conductor and a second power conductor, both configured as busbars, which are robust, high-capacity electrical conductors commonly used in industrial and power distribution systems. A magnetic core, shaped as a ring, encloses both busbars. This ring core is designed to capture the magnetic fields generated by the currents flowing through the busbars, allowing for precise current measurement without direct electrical contact. The ring core configuration ensures that the magnetic fields from both busbars are effectively coupled, enabling accurate current sensing. This design is particularly useful in applications where space is limited or where non-invasive measurement is required. The system leverages the inherent properties of busbars and magnetic cores to provide a reliable and scalable solution for current monitoring in power distribution networks. By integrating the busbars within a single ring core, the system minimizes interference and improves measurement accuracy, making it suitable for high-power environments where precise current monitoring is critical. The use of busbars as power conductors ensures compatibility with existing power infrastructure, while the ring core design enhances measurement efficiency and reliability.
11. The power system according to claim 10 , wherein a printed circuit board is arranged between the first busbar and the second busbar at least in the opening of the ring core.
A power system includes a ring core with an opening, a first busbar, and a second busbar. The first busbar is positioned on one side of the ring core, and the second busbar is positioned on the opposite side. The first and second busbars are electrically insulated from each other. The system further includes a printed circuit board arranged between the first and second busbars, at least within the opening of the ring core. The printed circuit board may include electronic components such as sensors, control circuits, or communication modules. The ring core may be part of a current sensor or transformer, where the busbars conduct electrical current, and the printed circuit board monitors or controls the current flow. The arrangement ensures electrical isolation between the busbars while integrating the circuit board within the compact structure. This design is useful in power distribution systems, electric vehicles, or industrial machinery where space efficiency and electrical isolation are critical. The printed circuit board may also include connectors or interfaces for external devices, enabling real-time monitoring and control of the power system.
12. The power system according to claim 4 , wherein a printed circuit board comprises the gain section and the injection section, wherein the first power conductor is a first busbar, wherein the second power conductor is a second busbar, wherein the first busbar and/or the second busbar are directly connected on the PCB for the electrical connection with the injection section.
This invention relates to power systems, specifically those involving printed circuit boards (PCBs) with integrated power distribution and signal injection. The system addresses the challenge of efficiently routing high-power signals while maintaining signal integrity and minimizing interference in electronic circuits. The invention features a PCB that includes both a gain section and an injection section, which are critical for amplifying and introducing signals into the system. The power distribution is managed through busbars, which are robust conductive elements designed to handle high currents with low resistance. The first and second busbars are directly connected to the PCB, ensuring a stable electrical connection with the injection section. This direct integration reduces parasitic inductance and resistance, improving overall system performance. The busbars may be embedded within or mounted on the PCB, depending on design requirements. The gain section amplifies signals before they are injected, while the injection section ensures precise signal introduction into the system. This configuration enhances power efficiency, signal quality, and reliability in high-performance electronic applications. The invention is particularly useful in systems requiring high-power signal processing, such as telecommunications, industrial automation, and high-frequency circuits.
13. The power system according to claim 4 , wherein a printed circuit board comprises the gain section and the injection section, wherein the core is a ring core, wherein the PCB comprises two recesses and a protrusion between the two recesses, wherein the ring core is received in the two recesses such that the protrusion extends through an opening formed by the ring core.
This invention relates to a power system with a printed circuit board (PCB) incorporating a gain section and an injection section. The system addresses the challenge of integrating magnetic components, such as ring cores, into PCBs while ensuring efficient power transfer and compact design. The PCB features two recesses and a central protrusion. A ring core is positioned within the recesses, with the protrusion extending through the core's central opening. This arrangement secures the core in place while optimizing space utilization and electrical performance. The gain section and injection section are integrated into the PCB, likely for signal amplification and injection locking, respectively, enhancing system functionality. The design minimizes assembly complexity and improves reliability by embedding the core directly into the PCB structure. This approach is particularly useful in high-frequency or high-power applications where compact, stable magnetic components are required. The invention focuses on efficient integration of magnetic elements into PCBs to improve performance and reduce footprint.
14. The power system according to claim 1 , wherein the active circuit is connected to ground such that a cancelling noise current injected in the first power conductor and the second power conductor can flow back to the active circuit through said ground connection.
A power system includes an active circuit designed to reduce electromagnetic interference (EMI) in a power distribution network. The system comprises a first power conductor and a second power conductor, each carrying electrical power. The active circuit generates a cancelling noise current that is injected into both power conductors to counteract unwanted noise signals, thereby reducing EMI. The active circuit is connected to ground, allowing the cancelling noise current to flow back to the active circuit through this ground connection. This configuration ensures that the cancelling current completes its circuit, maintaining effective noise suppression without disrupting the power distribution system. The ground connection provides a return path for the cancelling current, enhancing the system's ability to mitigate EMI while maintaining stable power delivery. The active circuit dynamically adjusts the cancelling current based on detected noise levels, ensuring continuous and adaptive noise reduction. This approach improves the reliability and performance of electronic devices connected to the power system by minimizing interference from power line noise.
15. EMI filter for a DC network comprising a first power conductor, a second power conductor and an active circuit, wherein the active circuit comprises: a sensing section for sensing a noise in the first and second power conductor, a gain section for generating a cancelling noise on the basis of the noise sensed in the sensing section, and an injection section for injecting the cancelling noise from the gain section into the first power conductor or the second power conductor, wherein the injection section comprises a first coupling capacitance configured to inject the cancelling noise in the first power conductor, wherein the first coupling capacitance comprises a plurality of parallel capacitors with different capacitive values, wherein the active circuit is configured to reduce the noise in at least the complete bandwidth between 150 kHz and 30 MHz.
This invention relates to an electromagnetic interference (EMI) filter for a DC network, addressing the problem of high-frequency noise in power conductors. The filter includes an active circuit that senses, generates, and injects a cancelling noise signal to mitigate EMI across a wide frequency range. The active circuit comprises three key sections: a sensing section that detects noise in the first and second power conductors, a gain section that generates a cancelling noise signal based on the sensed noise, and an injection section that introduces this cancelling signal into one or both power conductors. The injection section uses a first coupling capacitance, which consists of multiple parallel capacitors with varying capacitive values, to efficiently inject the cancelling noise. This design ensures effective noise reduction across the entire bandwidth from 150 kHz to 30 MHz, providing a robust solution for suppressing EMI in DC networks. The active circuit dynamically adapts to noise variations, ensuring consistent performance over the specified frequency range.
16. The power system according to claim 2 , wherein the sensing section comprises a current transformer to sense a noise current in the first power conductor and the second power conductor, wherein the gain section is configured for generating a cancelling noise on the basis of the noise current sensed in the sensing section, and the injection section is configured for injecting with a coupling capacitance the cancelling noise from the gain section into the first power conductor and the second power conductor, wherein the sensing section and the injection section are arranged in a feedback orientation meaning that the injection point of an injection section is arranged upstream of a sensing point of the sensing section in the direction of the noise current.
This invention relates to power systems, specifically addressing noise reduction in power conductors. The system includes a sensing section, a gain section, and an injection section. The sensing section uses a current transformer to detect noise currents in two power conductors. The gain section generates a cancelling noise signal based on the sensed noise current. The injection section then injects this cancelling noise back into the power conductors using a coupling capacitance. The system is arranged in a feedback orientation, where the injection point is positioned upstream of the sensing point relative to the noise current flow. This configuration ensures that the cancelling noise effectively reduces the original noise by counteracting it before it propagates further. The feedback loop continuously monitors and adjusts the cancelling signal to maintain noise suppression. The invention improves power quality by mitigating noise interference in electrical systems, particularly in applications where signal integrity is critical.
17. A power system for an electrically driven vehicle comprising: a battery; a charging interface for receiving external power to charge the battery; a network connecting the battery and the charging interface, wherein at least a part of the network is a DC network; an EMI filter between the battery and the charging interface in the DC network, wherein the EMI filter comprises an active circuit, wherein the active circuit comprises: a sensing section comprising a current transformer to sense a noise current in the first power conductor and the second power conductor, wherein the sensing section comprises a current transformer with a core inductively coupling the first power conductor, the second power conductor and an auxiliary conductor of the active circuit, wherein the auxiliary conductor is connected to a gain section, wherein a material of the core has a constant permeability between 150 kHz and 30 MHz, the gain section for generating a cancelling noise on the basis of the noise current sensed in the sensing section, and an injection section for injecting with a coupling capacitance the cancelling noise from the gain section into the first power conductor and the second power conductor, wherein the sensing section and the injection section are arranged in a feedback orientation meaning that an injection point of the injection section is arranged upstream of a sensing point of the sensing section in the direction of the noise current.
This invention relates to power systems for electrically driven vehicles, specifically addressing electromagnetic interference (EMI) in DC charging networks. The system includes a battery, a charging interface for receiving external power, and a DC network connecting them. An EMI filter is integrated into the DC network to reduce noise currents. The filter uses an active circuit with three key sections: a sensing section, a gain section, and an injection section. The sensing section employs a current transformer with a core that inductively couples the power conductors and an auxiliary conductor. The core material maintains constant permeability between 150 kHz and 30 MHz, ensuring accurate noise detection. The gain section generates a cancelling noise signal based on the sensed noise current. The injection section then injects this cancelling noise back into the power conductors via a coupling capacitance. The sensing and injection sections are arranged in a feedback orientation, where the injection point is upstream of the sensing point relative to the noise current flow. This configuration enhances noise suppression by actively counteracting EMI before it propagates further. The system improves charging efficiency and reliability by minimizing electromagnetic disturbances in the DC network.
18. A power system for an electrically driven vehicle comprising: a battery; a charging interface for receiving external power to charge the battery; a DC network connecting the battery and the charging interface; an EMI filter between the battery and the charging interface in the DC network, wherein the EMI filter comprises an active circuit, wherein the active circuit comprises: a sensing section comprising a current transformer to sense a noise current in the first power conductor and the second power conductor, a gain section for generating a cancelling noise on the basis of the noise current sensed in the sensing section, and an injection section for injecting with a coupling capacitance the cancelling noise from the gain section into the first power conductor and the second power conductor, wherein the sensing section and the injection section are arranged in a feedback orientation meaning that an injection point of the injection section is arranged upstream of a sensing point of the sensing section in the direction of the noise current.
This invention relates to power systems for electrically driven vehicles, specifically addressing electromagnetic interference (EMI) issues during battery charging. The system includes a battery, a charging interface for receiving external power, and a DC network connecting these components. An EMI filter is integrated into the DC network between the battery and the charging interface to mitigate noise currents. The filter employs an active circuit with three key sections: a sensing section, a gain section, and an injection section. The sensing section uses a current transformer to detect noise currents in the power conductors. The gain section generates a cancelling noise signal based on the sensed noise, while the injection section injects this cancelling signal back into the power conductors via a coupling capacitance. The sensing and injection sections are arranged in a feedback orientation, meaning the injection point is positioned upstream of the sensing point relative to the noise current flow. This configuration ensures effective noise cancellation by actively counteracting EMI before it propagates further. The active EMI filter improves charging efficiency and reduces electromagnetic disturbances in the vehicle's power system.
19. The power system according to claim 18 , wherein the sensing section comprises a current transformer with a core inductively coupling the first power conductor, the second power conductor and an auxiliary conductor of the active circuit, wherein the auxiliary conductor is connected to the gain section, wherein the auxiliary conductor comprises less than less than 3 windings.
The invention relates to power systems, specifically to a sensing section within an active circuit that monitors electrical parameters such as current. The problem addressed is the need for accurate and efficient current sensing in power systems while minimizing complexity and cost. The sensing section includes a current transformer with a core that inductively couples to both a first and second power conductor, as well as an auxiliary conductor. The auxiliary conductor is connected to a gain section and has fewer than three windings, ensuring a compact and low-loss design. The current transformer provides isolated measurement of current flowing through the power conductors, while the auxiliary conductor with minimal windings reduces parasitic effects and improves signal integrity. The gain section amplifies the sensed signal for further processing or control. This configuration allows for precise current monitoring with minimal additional circuitry, making it suitable for high-efficiency power systems. The use of an auxiliary conductor with limited windings ensures low inductance and resistance, enhancing overall system performance.
20. The power system according to claim 18 , wherein the active circuit is configured to reduce the noise in at least the complete bandwidth between 150 kHz and 30 MHz.
This invention relates to power systems designed to mitigate electromagnetic interference (EMI) noise, particularly in the frequency range of 150 kHz to 30 MHz. The system includes an active circuit that dynamically suppresses noise across this entire bandwidth, ensuring compliance with regulatory standards and improving signal integrity in electronic devices. The active circuit employs adaptive filtering techniques to identify and attenuate noise sources in real-time, preventing disruptions to sensitive components. By targeting a broad frequency range, the system addresses both conducted and radiated EMI, which are common challenges in high-frequency applications such as telecommunications, industrial automation, and medical equipment. The active circuit integrates with the power system's existing infrastructure, requiring minimal modifications while providing robust noise suppression. This approach enhances operational reliability and reduces the need for bulky passive filters or shielding, making it suitable for compact and high-performance electronic systems. The invention ensures that power delivery remains stable and interference-free, even in environments with high electromagnetic activity.
21. The power system according to claim 18 , wherein the injection point of the injection section is arranged upstream of the sensing point of the sensing section in the direction of the noise current so that the sensing section senses the difference between the noise current and the injected cancelling noise.
A power system is designed to mitigate noise currents in electrical circuits. The system includes an injection section and a sensing section. The injection section generates a cancelling noise signal that is injected into the circuit to counteract unwanted noise currents. The sensing section monitors the circuit to detect the remaining noise after cancellation. The injection point of the injection section is positioned upstream of the sensing point of the sensing section in the direction of the noise current flow. This arrangement ensures that the sensing section measures the difference between the original noise current and the injected cancelling noise, allowing for precise noise reduction. The system dynamically adjusts the cancelling noise based on the sensed difference to achieve effective noise suppression. This approach improves signal integrity and reduces interference in power distribution and electronic systems. The system may be applied in various power delivery networks, including those in industrial, automotive, or consumer electronics, where noise reduction is critical for reliable operation. The upstream placement of the injection point relative to the sensing point ensures accurate feedback control, enhancing the overall effectiveness of the noise cancellation process.
22. The power system according to claim 18 , wherein the EMI filter is arranged in a feedback orientation with respect to the noise current from the charging interface as a noise source, wherein the power system comprises a second EMI filter between the battery and the EMI filter in the DC network, wherein the second EMI filter comprises a second active circuit, wherein the second active circuit comprises: a second sensing section comprising a current transformer to sense a second noise current in the first power conductor and the second power conductor, a second gain section for generating a second cancelling noise on the basis of the second noise current sensed in the second sensing section, and a second injection section for injecting with a coupling capacitance the second cancelling noise from the second gain section into the first power conductor and the second power conductor, wherein the second sensing section and the second injection section are arranged in a feedback orientation meaning that an injection point of the second injection section is arranged upstream of a sensing point of the second sensing section in the direction of the noise current from the battery as a noise source.
This invention relates to power systems with enhanced electromagnetic interference (EMI) filtering, specifically addressing noise current issues in battery charging interfaces. The system includes an EMI filter arranged in a feedback orientation to mitigate noise generated by the charging interface. A second EMI filter is positioned between the battery and the primary EMI filter in the DC network. This second filter contains an active circuit designed to sense, generate, and inject a cancelling noise signal. The active circuit comprises a sensing section with a current transformer that detects noise current in the power conductors, a gain section that generates a cancelling noise based on the sensed current, and an injection section that introduces this cancelling noise back into the power conductors via a coupling capacitance. The sensing and injection points are positioned such that the injection point is upstream of the sensing point relative to the noise current flow from the battery, ensuring effective noise cancellation in a feedback loop configuration. This dual-filter arrangement improves EMI suppression in battery-powered systems by targeting noise sources at multiple points in the power distribution network.
23. The power system according to claim 22 , wherein the charging interface comprises a power converter.
A power system is designed to manage and distribute electrical power efficiently, particularly in applications where power sources and loads may vary dynamically. The system addresses challenges related to power conversion, distribution, and charging in environments such as electric vehicles, renewable energy integration, or industrial power management. A key component of the system is a charging interface that facilitates the transfer of electrical power between a power source and a load. This charging interface includes a power converter, which is a device that converts electrical power from one form to another, such as alternating current (AC) to direct current (DC) or vice versa, or adjusting voltage and current levels to match the requirements of the connected devices. The power converter ensures compatibility between different power sources and loads, optimizing energy transfer efficiency and reliability. By incorporating the power converter within the charging interface, the system can adapt to varying power conditions, support multiple charging standards, and enhance overall performance in dynamic power environments. This design improves flexibility, efficiency, and reliability in power distribution and charging applications.
24. The power system according to claim 17 , wherein the active circuit is configured to reduce the noise in at least the complete bandwidth between 150 kHz and 30 MHz.
The invention relates to a power system designed to mitigate electromagnetic interference (EMI) noise, particularly in high-frequency applications. The system includes an active circuit that dynamically suppresses noise across a broad frequency range, specifically between 150 kHz and 30 MHz. This active circuit employs adaptive filtering techniques to identify and attenuate noise signals, ensuring compliance with regulatory standards and improving signal integrity in electronic devices. The power system may also incorporate passive filtering components to further enhance noise reduction. The active circuit is integrated into the power system to provide real-time noise suppression, addressing challenges in environments where high-frequency noise can degrade performance. The invention is particularly useful in applications requiring precise signal processing, such as telecommunications, industrial automation, and medical equipment, where EMI can disrupt operations. By covering the entire bandwidth from 150 kHz to 30 MHz, the system ensures comprehensive noise mitigation, reducing the need for additional external filtering solutions. The active circuit's adaptive nature allows it to respond to varying noise conditions, maintaining optimal performance under different operational scenarios.
25. The power system according to claim 17 , wherein the auxiliary conductor comprises less than less than 3 windings.
A power system includes a primary conductor and an auxiliary conductor configured to transfer electrical power between a power source and a load. The auxiliary conductor is designed to reduce electromagnetic interference (EMI) and improve power transfer efficiency. The system may include a transformer with primary and secondary windings, where the auxiliary conductor is magnetically coupled to the primary conductor. The auxiliary conductor has fewer than three windings, which simplifies its structure and reduces material costs while maintaining effective power transfer. The system may also include a controller to regulate power flow and minimize losses. The auxiliary conductor's reduced winding count ensures compatibility with high-frequency power transfer applications, such as renewable energy systems or electric vehicle charging, where EMI and efficiency are critical. The design balances performance and cost by optimizing the number of windings to achieve reliable power transfer without unnecessary complexity.
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February 28, 2018
November 26, 2019
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